I get a lot of questions, that ask when can I mix Service conductors with feeders or branch circuits? The answer is you can not.
See the attached PDF showing some examples of Service conductors and Feeders.
Thought I would pass this along, shows how dangerous improper storage of batteries can be.
https://www.youtube.com/embed/CnVDayI-gwI?feature=player_detailpage
553.883 Smoke alarms in one-family and two-family dwellings and townhomes.—One-family and two-family dwellings and townhomes undergoing a repair, or a level 1 alteration as defined in the Florida Building Code, may use smoke alarms powered by 10-year nonremovable, nonreplaceable batteries in lieu of retrofitting such dwelling with smoke alarms powered by the dwelling’s electrical system. Effective January 1, 2015, a battery-powered smoke alarm that is newly installed or replaces an existing battery-powered smoke alarm must be powered by a nonremovable, nonreplaceable battery that powers the alarm for at least 10 years. The battery requirements of this section do not apply to a fire alarm, smoke detector, smoke alarm, or ancillary component that is electronically connected as a part of a centrally monitored or supervised alarm system.
History.—s. 25, ch. 2014-154.
Make sure that you check with the local authority. They may have more stringent rules that apply.
I was sent this search tool from UL and wanted to share it with you. Just click on the link and then click on the appropriate book you want to search.
I have tried several 2011 Code book searches and they all helped me find what I was looking for! This tool will help you search listings for different materials
and how they are listed. Let me know what you think! Found it to be a great help when a listing question comes up.
Till the next time work safe be safe.
Jake
In the 2011 NEC they changed the numbering to the Ampacity Table 310.16, Also moved is the ampacity correction factors to its own table.
In the 2011 NEC article 110.24 has a few changes that need to be be addressed. Under 110.24(A) Field Marking, service equipment in other than a dwelling unit shall be field marked with the maximum available fault current. This is something you will have to get with the utility or the engineer for the project to be able to calculate. The field markings will have to be able to with stand the elements when a attached to a disconnect or panelboard out in the field. Section 110.24(B) Modifications will make you as the installer responsible to attach newly calculated fault current information to the equipment based on modification made to the circuits. All information provided will have to with stand the elements in which they are installed so a Sharpie or Magic Marker is not going to meet the requirements of this new change because they don’t last out in the weather. Till next time work safe…
For the 2011 edition of the NEC on page 275 of the softbound Code book, they have added the requirement for field identification of all switchboards and panelboards, to indicate where the power to that equipment originates. It will be easier to mark these panel and switch boards when they are installed. Trying to find the source 5 or 10 years down the road has always been a time consuming project that only takes minutes when first installed. A great addition to the code, will make life as an electrician easier in the future. Till next time work safe and be safe.
Jake
The yellow highlighted material below is a new Code change for 2011. GFCI protection has been expanded to cover other areas that have been shown to have problems.
Till next time work safe and be safe.
Jake
Ever wonder why the PVC conduit run on the side of a building is all wavy and looks awful, it’s because the installer probably forgot to include an expansion fitting. Per NEC section 352.44 PVC conduit requires an expansion fitting where the PVC pipe is expected to move 1/4″ or more. Here in So. Florida the PVC is expected to move approximately 2.64″ based on our average temperature range.
See the attached link on how to install one of these fittings. http://0323c7c.netsolhost.com/docs/Conduit%20expansion%20fittings.pdf
Till next time.
Be safe, work safe
Jake
